PlzNavigate: fix regression on the FYI bot.

third_party/WebKit/Source/web/WebLocalFrameImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 1998 matching lines @@
 }
 
 bool WebLocalFrameImpl::maybeRenderFallbackContent(
     const WebURLError& error) const {
   DCHECK(frame());
 
   if (!frame()->owner() || !frame()->owner()->canRenderFallbackContent())
     return false;
 
   FrameLoader& frameloader = frame()->loader();
+  frameloader.clearNavigationHandledByClient();
   frameloader.loadFailed(frameloader.documentLoader(), error);
   return true;
 }
 
 bool WebLocalFrameImpl::isLoading() const {
   if (!frame() || !frame()->document())
     return false;
   return frame()->loader().stateMachine()->isDisplayingInitialEmptyDocument() ||
          frame()->loader().hasProvisionalNavigation() ||
          !frame()->document()->loadEventFinished();
@@ skipping 325 matching lines @@
       ->frameScheduler()
       ->unthrottledTaskRunner()
       ->toSingleThreadTaskRunner();
 }
 
 WebInputMethodControllerImpl* WebLocalFrameImpl::inputMethodController() const {
   return m_inputMethodController.get();
 }
 
 }  // namespace blink